121444143100 has 108 divisors (see below), whose sum is σ = 308274566040. Its totient is φ = 41405078400.

The previous prime is 121444143083. The next prime is 121444143109. The reversal of 121444143100 is 1341444121.

It is a super-2 number, since 2×121444143100² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121444143109) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 807870 + ... + 946330.

It is an arithmetic number, because the mean of its divisors is an integer number (2854394130).

Almost surely, 2^121444143100 is an apocalyptic number.

121444143100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121444143100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154137283020).

121444143100 is an abundant number, since it is smaller than the sum of its proper divisors (186830422940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121444143100 is a wasteful number, since it uses less digits than its factorization.

121444143100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138668 (or 138654 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 121444143100 its reverse (1341444121), we get a palindrome (122785587221).

The spelling of 121444143100 in words is "one hundred twenty-one billion, four hundred forty-four million, one hundred forty-three thousand, one hundred".